Improvement in watchmakers  tools



NITED STATES PATENT QFFICE.

LEONARD o. BUTGH, or LANCASTER, AND AUGUSTIN F. THOMA, or PIQUA, 01110.

IMPROVEMENT IN WATCHMAKERS TOOLS.

Specification forming part of Letters Patent No. 120,618, dated November7, 1871.

To all whom it may concern:

Be it known that we, LEONARD O. BUTCH, of Lancaster, in the county ofFairfield, and AU- GUSTIN F. THOMA, of Piqua, in the county of Miami andState of Ohio, have invented a new and useful Improvement in WatchmakersTool and I do hereby declare that the following is a full, clear, andexact description thereof, which will enable others skilled in the artto make and use the same, reference being had to the accompanyingdrawing forming part of this specification.

Our invention relates to a new and improved tool adapted for severaluses in the watchmakers or repairers trade, such as holding thebalancewheel staff for removing the roller-table, replacing the saidroller on the staff, poising the balance, and holding screws, the saidtool being constructed and arranged as hereinafter described.

Figure l is a top view of the improved machine. Fig. 2 is a transversesection of the same, and Fig. 3 is a plan of the bottom.

Similar letters of reference indicate correspon ding parts.

A is a wide flat ring of metal, mounted on four short legs, B. O is aflat bar, extending across the upper side of said ring and made fast toit, with one edge in the diametrical line and one end proj ecting beyondthe outer edge of the ring, where it is jointed to another bar, D,similar to 0, but a little wider, and not made fast to the ring. Thesebars have each a slight semicircular cavity in the edge, forming a hole,E, where the two are closed together, said hole being at the center ofthe ring, and the said bars are countersunk around said hole, as shownat F, to make them thin enough to clamp the balance-staff Gr between thewheel H and the roller-table I, as indicated in Fig. 3, for removing thesaid table, by a punch applied to the top of the staff to receive a blowto drive the staff out. The bar 0 is provided with a vertical slot ormortise, K, through it, for use in applying the roller-table to thestaff by laying the roller over said slot, so that the pivot will passthrough it and admit of driving the stafl' by any suitable punch. Lrepresents screw-holes gauged to the different screws used, and numberedaccording to the gauges, for holding the said screws conveniently foruse, and, at the same time, determining the sizes. M represents notchesin the edges of the bars 0 and D, adapted for holding the balance-wheelfor poising it. The bar D is provided with a slotted arm, N, and aclamp-screw, O, for securing it at any required distance from the otherbar.

The tool thus constructed iscomplete in itself that is to say, isself-supporting, and does not require to be fastened in a vise, as othertools for a similar purpose have to be.

Having thus described our invention, what we claim as new, and desire tosecure by Letters Patent, is-

The improved watchmakers tool, consisting oi the stand A, jointed bars GD, slotted arm and clamp-screw O, the said arms being provided withsuitable notches, holes, &c., for holding various parts of a watch,screws, &c., all substantially as specified.

LEONARD (J. BUTCH. AUGUSTIN F. THOMA. Witnesses:

Tnos. J. HANsoN, H. 0. DRINKLE. (36)

